Doppler ultrasound had been used for measuring kidney blood flow circulating KBFC on 360 subjects (720 kidneys). Depending on the age, in young men of control group, KBFC of male subject 1164.620 ± 184.932 ml/minute, of female 1235.00 ± 194.795 ml/minute, in both 2 gender 1199.811 ± 192.144 ml/minute. In comparing with the control subjects, the KBFC began to vary, decreased 6.91% in medium age subjects, in the senil subjects the decrease was obvious 11.79%, in the elderly: very obvious 27.27%. The age had had a strictly negative relation to KBFC variation.
Ultrasonics ; Aged ; Blood

878 enrolled subjects were divided into 4 age groups: control group, aged 18-44, medium group, aged 45-59, senil group, aged 60-74 and older group, aged 75-90. Kidney-renal cavity parenchyma and the ratio of kidney-renal cavity parenchyma had varied according to the age and the most obvious variation was in the eldest group. There was a strictly negative correlation between the age and the variation of kidney parenchyma and kidney parachyma – renal cavity ratio.
Ultrasonography ; Aged ; Control Groups